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zysi [14]
3 years ago
8

How is 81^1/4 is 3?

Mathematics
1 answer:
e-lub [12.9K]3 years ago
6 0

Answer:

\sqrt[4]{81}  =  {( {3}^{4}) }^{ \frac{1}{4} }

Step-by-step explanation:

it's obvious that 3·3·3·3=81

or you can do the prime factorization of 81

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Mary is an years old. What expression represents her age 7 years from now? Two years ago?
Rudiy27

Answer

What expression represents her age 7 years from now?

y =x+7x

Two years ago?

z=y-2x

Step-by-step explanation:

7 0
3 years ago
Solve this question...6
Hitman42 [59]

Answer:

Step-by-step explanation:

1 tyres time to install is 56/4=14

which means it takes 14 minutes to install one tire.

so 12 tires would be 12 x 14 which is 168 minutes

A) 168 minutes

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B) 3 tires

4 0
2 years ago
100 POINTS! Will give BRAINLIST!
dalvyx [7]

Answer:

$441. 155

Step-by-step explanation:

You have to multiply $33.935 x 13.

--------------------------------------------------------------

            33.935

      x            13

----------------------

           101805

      +  339350  

----------------------

       441.155

6 0
2 years ago
The safety inspector in a large city wants to estimate the proportion of buildings in the city that are in violation of fire cod
Drupady [299]

Answer:

Proportion of buildings in the city that have fire code violations: 10%

Uncertainty 0.3 = 30%

Step-by-step explanation:

This situation complies with a binomial model where p is the probability of finding a building having fire code violations and q=1-p

Since in random sample of 40 buildings chosen for inspection 4 of them are found to have fire code violations, the proportion  is 4/40 = 0.1 or 10% and  p=0.1 as well.

<em>In a</em> <em>binomial model the standard deviation s is: </em>

<em>\large s=\sqrt{npq} </em>

<em>where n is the sample size</em>. So

\large s=\sqrt{40*0.1*0.9}=1.8974

and the uncertainty is the standard error SE

\large SE=\frac{s}{\sqrt{n}}=\frac{1.8974}{\sqrt{40}}=0.3=30\%

7 0
3 years ago
To whom does Jefferson address the Declaration?
Vladimir [108]

Answer:

the declaration is addressed to all mankind

Step-by-step explanation:

3 0
3 years ago
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